code: def test_cov_params(self):
      assert_almost_equal(self.res.bse, self.res_glm.bse[1:], DEC - 1)
      assert_almost_equal(self.res.bse, self.res_discrete.bse, DEC5)
  
imports: import pytest
  import numpy
  from numpy.testing import assert_almost_equal
  from scipy import stats
  import statsmodels.api
  from statsmodels.miscmodels.count import PoissonGMLE, PoissonOffsetGMLE, PoissonZiGMLE
  from statsmodels.discrete.discrete_model import Poisson
  from statsmodels.tools.sm_exceptions import ValueWarning
label_desc: Use image node_id 3 for calling the TestPoissonOffset obj's underlying member method code with example usage: obj.test_cov_params() without return types